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The effects of ocean acidification and increased temperatures on the survival, growth, and morphology of red king crab (Paralithodes camtschaticus) (NCEI Accession 0170753)

Published by NOAA National Centers for Environmental Information | National Oceanic and Atmospheric Administration, Department of Commerce | Catalog Last Checked: August 27, 2026 at 08:28 PM | Dataset Last Updated: April 18, 2019 at 12:00 AM
Multiple stressor studies are needed to better understand the effects of oceanic changes on marine organisms. To determine the effects of near-future ocean acidification and warming temperature on young of the year red king crab (Paralithodes camtschaticus) survival, growth, and morphology, we conducted a long-term (184 d) fully crossed experiment with two pHs and three temperatures: ambient pH (~7.99), pH 7.8, ambient temperature, ambient +2 degrees Celsius, and ambient +4 degrees Celsius, for a total of 6 treatments. Mortality rate increased with both reduced pH and by higher temperatures, but interpretation of the multistressor effects is not straightforward as a clear trend was not observed. A synergetic effect was observed; the pH 7.8 and ambient +4 degrees Celsius temperature treatment had the lowest survival, with only 3% surviving to the end of the experiment. However, antagonistic effects were observed in the pH 7.8 ambient +2 degrees Celsius temperature treatment; the mortality rate in this treatment was less than the mortality rate of each of the stressors individually. Despite the effects on mortality, neither decreased pH nor increased temperature had an effect on growth or morphology. The results of this study combined with other studies suggest that ocean acidification and warming may have profound negative effects on red king crab populations in the upcoming decades unless the species is able to quickly adapt or acclimate to changing conditions.

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0170753 DISSOLVED INORGANIC CARBON (DIC) INDIVIDUAL FISH EXAMINATION pH SALINITY total alkalinity WATER TEMPERATURE biological

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describedByType application/octet-steam
description Multiple stressor studies are needed to better understand the effects of oceanic changes on marine organisms. To determine the effects of near-future ocean acidification and warming temperature on young of the year red king crab (Paralithodes camtschaticus) survival, growth, and morphology, we conducted a long-term (184 d) fully crossed experiment with two pHs and three temperatures: ambient pH (~7.99), pH 7.8, ambient temperature, ambient +2 degrees Celsius, and ambient +4 degrees Celsius, for a total of 6 treatments. Mortality rate increased with both reduced pH and by higher temperatures, but interpretation of the multistressor effects is not straightforward as a clear trend was not observed. A synergetic effect was observed; the pH 7.8 and ambient +4 degrees Celsius temperature treatment had the lowest survival, with only 3% surviving to the end of the experiment. However, antagonistic effects were observed in the pH 7.8 ambient +2 degrees Celsius temperature treatment; the mortality rate in this treatment was less than the mortality rate of each of the stressors individually. Despite the effects on mortality, neither decreased pH nor increased temperature had an effect on growth or morphology. The results of this study combined with other studies suggest that ocean acidification and warming may have profound negative effects on red king crab populations in the upcoming decades unless the species is able to quickly adapt or acclimate to changing conditions.
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identifier https://data.noaa.gov/waf/NOAA/NESDIS/ncei/accessions/iso/xml/0170753.xml
issued 2018-02-21T00:00:00.000+00:00
keyword 
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  "NOAA Alaska Fisheries Science Center",
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  "NODC Ocean Acidification Scientific Data Stewardship (OADS)",
  "US DOC; NOAA; Office of Oceanic and Atmospheric Research; Ocean Acidification Program (OAP)",
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  "DOC/NOAA/NMFS/AFSC > Alaska Fisheries Science Center, National Marine Fisheries Service, NOAA, U.S. Department of Commerce",
  "Ocean Acidification Program (OAP)",
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  "EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > PH",
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  "EARTH SCIENCE > OCEANS > SALINITY/DENSITY > SALINITY",
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  "OCEAN > PACIFIC OCEAN > NORTH PACIFIC OCEAN > BERING SEA",
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license https://creativecommons.org/publicdomain/zero/1.0/
modified 2019-04-18T00:00:00.000+00:00
publisher 
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rights otherRestrictions
spatial -152.3965,57.796,-152.3965,57.796
temporal 2012-08-07T00:00:00+00:00/2013-01-29T00:00:00+00:00
theme 
[
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]
title The effects of ocean acidification and increased temperatures on the survival, growth, and morphology of red king crab (Paralithodes camtschaticus) (NCEI Accession 0170753)

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